Shell boilers - Part 5: Inspection during construction, documentation and marking of pressure parts of the boiler

This document specifies requirements for the inspection during construction, documentation and marking of shell boilers as defined in EN 12953-1.
NOTE   For other components, such as water tube walls, reference will be made to EN 12952 series.

Großwasserraumkessel - Teil 5: Prüfung während der Herstellung, Dokumentation und Kennzeichnung für drucktragende Kesselteile

Dieses Dokument legt Anforderungen für die Prüfung während und nach der Herstellung, Dokumentation und Kennzeichnung von in EN 12953 1:2012 definierten Großwasserraumkesseln fest.
ANMERKUNG   Für andere Komponenten wie z. B. Wasserrohrwände wird auf die Normenreihe EN 12952 [1] verwiesen.

Chaudières à tubes de fumée - Partie 5 : Contrôles en cours de construction, documentation et marquage des parties sous pression de la chaudière

Le présent document spécifie les exigences relatives à l’inspection durant et après la construction, à la documentation et au marquage des chaudières à tubes de fumée telles que définies dans l’EN 12953-1:2012.
NOTE Pour les autres composants, tels que les parois à tubes d'eau, il sera fait référence à la série EN 12952 [1].

Mnogovodni kotli - 5. del: Kontrola med proizvodnjo, dokumentacija in označevanje tlačno obremenjenih delov kotla

General Information

Status
Published In Translation
Public Enquiry End Date
04-Apr-2018
Publication Date
08-Jun-2020
Technical Committee
Current Stage
6100 - Translation of adopted SIST standards (Adopted Project)
Start Date
24-Aug-2021
Due Date
23-Aug-2022

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SLOVENSKI STANDARD
SIST EN 12953-5:2020
01-julij-2020
Nadomešča:
SIST EN 12953-5:2002
Mnogovodni kotli - 5. del: Kontrola med proizvodnjo, dokumentacija in
označevanje tlačno obremenjenih delov kotla

Shell boilers - Part 5: Inspection during construction, documentation and marking of

pressure parts of the boiler

Großwasserraumkessel - Teil 5: Prüfung während der Herstellung, Dokumentation und

Kennzeichnung für drucktragende Kesselteile
Chaudières à tubes de fumée - Partie 5 : Contrôles en cours de construction,
documentation et marquage des parties sous pression de la chaudière
Ta slovenski standard je istoveten z: EN 12953-5:2020
ICS:
27.060.30 Grelniki vode in prenosniki Boilers and heat exchangers
toplote
SIST EN 12953-5:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 12953-5:2020
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SIST EN 12953-5:2020
EN 12953-5
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 27.060.30 Supersedes EN 12953-5:2002
English Version
Shell boilers - Part 5: Inspection during construction,
documentation and marking of pressure parts of the boiler

Chaudières à tubes de fumée - Partie 5 : Contrôles en Großwasserraumkessel - Teil 5: Prüfung während der

cours de construction, documentation et marquage des Herstellung, Dokumentation und Kennzeichnung für

parties sous pression de la chaudière drucktragende Kesselteile
This European Standard was approved by CEN on 6 January 2020.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12953-5:2020 E

worldwide for CEN national Members.
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 6

4 Symbols ............................................................................................................................................................... 6

5 Inspection and testing ................................................................................................................................... 7

5.1 General ................................................................................................................................................................ 7

5.2 Approval of personnel ................................................................................................................................... 7

5.3 Calibration of equipment ............................................................................................................................. 7

5.4 Inspection activities ....................................................................................................................................... 7

5.5 Non-destructive examinations ................................................................................................................ 11

5.6 Weld production control test plates...................................................................................................... 19

5.7 Corrugated furnace tubes ......................................................................................................................... 21

5.8 Final assessment .......................................................................................................................................... 24

5.9 Economizer and superheater................................................................................................................... 25

6 Documentation, certification and marking ........................................................................................ 26

6.1 General ............................................................................................................................................................. 26

6.2 Documentation .............................................................................................................................................. 26

6.3 Declaration ..................................................................................................................................................... 26

6.4 Marking ............................................................................................................................................................ 26

Annex A (normative) Economizer and/or superheater with water tube design connected to

the shell boiler including piping ............................................................................................................. 28

A.1 General ............................................................................................................................................................. 28

A.2 Extent of NDT for welds for economizers and/or superheaters and/or piping .................... 28

Annex B (informative) Significant technical changes between this European Standard and

the previous edition .................................................................................................................................... 30

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be

covered............................................................................................................................................................. 31

Bibliography ................................................................................................................................................................. 32

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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
European foreword

This document (EN 12953-5:2020) has been prepared by Technical Committee CEN/TC 269 “Shell and

water-tube boilers”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by September 2020, and conflicting national standards shall

be withdrawn at the latest by September 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12953-5:2002.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this

document.

The informative Annex B lists the significant technical changes between this document and the previous

edition.
EN 12953, Shell boilers, consists of the following parts:
— Part 1: General;
— Part 2: Materials for pressure parts of boilers and accessories;
— Part 3: Design and calculation for pressure parts;
— Part 4: Workmanship and construction of pressure parts of the boiler;

— Part 5: Inspection during construction, documentation and marking of pressure parts of the boiler;

— Part 6: Requirements for equipment for the boiler;

— Part 7: Requirements for firing systems for liquid and gaseous fuels for the boilers;

— Part 8: Requirements for safeguards against excessive pressure;
— Part 9: Requirements for limiting devices of the boiler and accessories;
— Part 10: Requirements for feedwater and boiler water quality;
— Part 11: Acceptance tests;
— Part 12: Requirements for grate firing systems for solid fuels for the boiler;
— Part 13: Operating instructions;

— Part 14: Guideline for involvement of an inspection body independent of the manufacturer

[CR 12953-14].
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)

Although these parts can be obtained separately, the parts are interdependent. As such, the design and

manufacture of shell boilers requires the application of more than one part in order for the requirements

of the standard to be satisfactorily fulfilled.

NOTE A “Boiler Helpdesk” has been established in CEN/TC 269 which can be contacted for any questions

regarding the application of the European Standards series EN 12952 and EN 12953, see the following website:

http://www.boiler-helpdesk.din.de.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
1 Scope

This document specifies requirements for the inspection during and after construction, documentation

and marking of shell boilers as defined in EN 12953-1:2012.

NOTE For other components, such as water tube walls, reference will be made to the EN 12952 series [1].

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 764-1:2015+A1:2016, Pressure equipment - Part 1: Vocabulary
EN 764-2:2012, Pressure equipment - Part 2: Quantities, symbols and units
EN 12953-1:2012, Shell boilers - Part 1: General

EN 12953-3:2016, Shell boilers - Part 3: Design and calculation for pressure parts

EN 12953-4:2018, Shell boilers - Part 4: Workmanship and construction of pressure parts of the boiler

EN 13018:2016, Non-destructive testing - Visual testing - General principles

EN ISO 3452-1:2013, Non-destructive testing - Penetrant testing - Part 1: General principles (ISO 3452-

1:2013, Corrected version 2014-05-01)

EN ISO 4136:2012, Destructive tests on welds in metallic materials - Transverse tensile test (ISO 4136:2012)

EN ISO 5173:2010, Destructive tests on welds in metallic materials - Bend tests (ISO 5173:2009)

EN ISO 5178:2019, Destructive tests on welds in metallic materials - Longitudinal tensile test on weld metal

in fusion welded joints (ISO 5178:2019)

EN ISO 5817:2014, Welding - Fusion-welded joints in steel, nickel, titanium and their alloys (beam welding

excluded) - Quality levels for imperfections (ISO 5817:2014)

EN ISO 6520-1:2007, Welding and allied processes - Classification of geometric imperfections in metallic

materials - Part 1: Fusion welding (ISO 6520-1:2007)

EN ISO 9016:2012, Destructive tests on welds in metallic materials - Impact tests - Test specimen location,

notch orientation and examination (ISO 9016:2012)

EN ISO 9712:2012, Non-destructive testing - Qualification and certification of NDT personnel (ISO

9712:2012)

EN ISO 11666:2018, Non-destructive testing of welds - Ultrasonic testing - Acceptance levels (ISO

11666:2018)

EN ISO 15614-1:2017, Specification and qualification of welding procedures for metallic materials -

Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys

(ISO 15614-1:2017, Corrected version 2017-10-01)
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)

EN ISO 17636-1:2013, Non-destructive testing of welds - Radiographic testing - Part 1: X- and gamma-ray

techniques with film (ISO 17636-1:2013)

EN ISO 17636-2:2013, Non-destructive testing of welds - Radiographic testing - Part 2: X- and gamma-ray

techniques with digital detectors (ISO 17636-2:2013)

EN ISO 17637:2016, Non-destructive testing of welds - Visual testing of fusion-welded joints (ISO

17637:2016)

EN ISO 17638:2016, Non-destructive testing of welds - Magnetic particle testing (ISO 17638:2016)

EN ISO 17639:2013, Destructive tests on welds in metallic materials - Macroscopic and microscopic

examination of welds (ISO 17639:2003)

EN ISO 17640:2018, Non-destructive testing of welds - Ultrasonic testing - Techniques, testing levels, and

assessment (ISO 17640:2018)

EN ISO 23279:2017, Non-destructive testing of welds - Ultrasonic testing - Characterization of

discontinuities in welds (ISO 23279:2017)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 12953-1:2012,

EN 764-1:2015+A1:2016, EN 764-2:2012 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
seam
generic term for welded joints, welded seams or welds
3.2
non-destructive testing (NDT)
non-destructive examination (NDE)

conventional and new techniques of radiographic, ultrasonic, magnetic particle examination, visual

testing and/or penetrant testing
3.3
pressure part
pressure bearing part

component directly subjected to pressure (e.g. shell) or needed to withstand the pressure

(e.g. reinforcement ring of the branch or the furnace)
4 Symbols

For the purposes of this document, the symbols given in EN 12953-1:2012, Table 1 shall apply.

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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
5 Inspection and testing
5.1 General

The manufacturer shall be responsible for ensuring the boiler conforms to the requirements of this

European Standard. Conformity shall be confirmed by the completion of a series of inspection activities

as given in Table 1.

Depending upon the conformity assessment module chosen by the manufacturer for the design and

manufacture of each boiler, the inspection activities shall involve, to a greater or lesser extent,

organizations which are independent of the manufacturer.

The manufacturer shall provide all the necessary access to enable the responsible authority to carry out

the activities in which it is required to be involved.
5.2 Approval of personnel
5.2.1 Check of welder and welding operator approval

The manufacturer shall ensure that the welding of the boiler has been done by welders and welding

operators who have been approved under the requirements of EN 12953-4:2018, 5.14 and the

appropriate certification shall be made available on request.
5.2.2 Approval of non-destructive examination personnel

Personnel responsible for non-destructive testing, including interpretation, evaluation and reporting

shall be certified in accordance with the general requirements of EN ISO 9712:2012.

An exception to this requirement shall be made for visual testing of welds and final inspection of boilers,

for which EN ISO 9712:2012 is not applicable.

Magnetic particle testing (MT) shall be performed under the direct supervision of personnel qualified to

level 2 of EN ISO 9712:2012 as a minimum.

Penetrant testing (PT) shall be performed under the direct supervision of personnel qualified to level 2

of EN ISO 9712:2012 as a minimum.

Ultrasonic testing (UT) shall be performed by an operator qualified to level 2 of EN ISO 9712:2012 as a

minimum for UT.

Images of radiographic testing (RT) shall be viewed by personnel qualified to level 2 of EN ISO 9712:2012

as a minimum.

For new NDT techniques, the operator shall be qualified to the equivalent level as MT, PT, UT and RT.

Visual testing (VT) shall be carried out by trained and experienced personnel having sufficient knowledge

in welding techniques, and a full comprehension of this European Standard, to identify and interpret

imperfections that might occur at the surface of the weld and the heat affected zone.

5.3 Calibration of equipment

The manufacturer shall establish procedures to ensure that tools, gauges, instruments and other

measuring and testing devices used in the manufacture and inspection activities affecting boiler quality,

are properly controlled, calibrated and adjusted at specific intervals, to maintain accuracy within defined

limits.
5.4 Inspection activities

The manufacturer shall confirm that the boiler components, as a minimum, conform to the requirements

of this European Standard by performing and authenticating the inspection activities listed in Table 1.

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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
Table 1 — List of inspection activities to be undertaken by the manufacturer
Reference no. Area of activity Inspection operation
1 Design and general
documentation
Ensure that the design data/calculations
conform to:
— technical specifications
1.1 Design data/calculations
— the requirements of this European
Standard
Ensure that drawing information conforms to:
— design data and calculations
— technical specifications
1.2 Design drawings
— the requirements of this European
Standard
Ensure that material and component
specifications conform to:
— technical specifications
1.3 Specifications for suppliers
— design drawings, if applicable
— the requirements of this European
Standard
Ensure that the specification for sub-
contracted parts conform to:
— technical specifications
Specifications for sub-
1.4
— design drawings, if applicable
contracted parts
— the requirements of this European
Standard
2 Material for pressure parts
Verify that certificate information and results
2.1 Material certificates
conform to the design specification
Verify that the consumables to be used are in
2.2 Welding consumables
accordance with the design specification
Identify the material with the material
2.3 Material identification
certificates and check the markings
Ensure that the traceability of identification
Traceability of identification
2.4 marks is in accordance with the approved
marks
procedure
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
Reference no. Area of activity Inspection operation
Acceptance of sub-contracted Verify that sub-contracted parts conform to the
2.5
parts boiler manufacturer's specification
3 Material for attachments welded to a pressure part
Verify that certificate information and results
3.1 Material certificates
conform to the design specification
Verify that the consumables to be used are in
3.2 Welding consumables
accordance with the design specification
Acceptance of sub-contracted Verify that sub-contracted parts conform to the
3.3
parts boiler manufacturer's specification
4 Fabrication and welding
Verify that appropriate welding specifications
Welding procedure are available and that their contents are
4.1
specifications compatible with the welding procedure
approvals
Verify that the welding procedures are
appropriate for the materials and the field of
4.2 Welding procedure approvals
welding application, and that they have been
approved by a responsible authority
Verify that the welder approvals have been
4.3 Welder approval approved by a responsible authority and that
they are available and valid
4.4 Forming procedures Verify that forming procedures are available,
where applicable, and their contents are
appropriate to the product to be formed
4.5 Formed parts Examine formed parts in accordance with the
requirements of this European Standard
Weld preparation and welding shall be in
accordance with the welding procedure
4.6 Welding specification (WPS) and the Quality
Management System or Quality Procedure of
the manufacturer
Witness removal and marking of production
test plates
Verify that any post-weld heat treatment
(PWHT) on production test plates independent
of the boiler complies with the specific heat
4.7 Production test plates, if any
treatment applied to the boiler
Examine NDT reports on production test plates
Identify and mark the test specimens taken
from production test plates for mechanical
tests
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
Reference no. Area of activity Inspection operation
Verify that the test information and results
from the mechanical tests contained in the
manufacturer's report conform to the
requirements of this European Standard
5 Non-destructive examination of welds
Verify that appropriate non-destructive
Non-destructive examination examination procedures are available and
5.1
procedures ensure the qualification of the originator is
appropriate
Non-destructive examination Ensure the non-destructive examination
5.2
operator qualifications operator's qualifications are appropriate
Scrutinize any radiographs and check
conformance to the acceptance criteria
Non-destructive examination
5.3
Verify that the results of any ultrasonic
operation
examination conforms to the acceptance
criteria
Non-destructive examination Verify that the information and results conform
5.4
reports to the acceptance criteria
6 Post-weld heat treatment (PWHT) (if applicable)
Verify that the post-weld heat treatment
6.1 PWHT procedures
procedures conform to this European Standard
Verify that temperature/time recordings
6.2 PWHT records conform to the requirements of this European
Standard
7 Final inspection and hydrostatic pressure test
Carry out dimensional checking, visual testing
Final inspection before and identification of accessible parts after
7.1
hydrostatic pressure test component completion, prior to hydrostatic
pressure test
Ensure the final hydrostatic pressure test is
7.2 Hydrostatic pressure test carried out in accordance with the
requirements of this European Standard
Perform visual testing on completion of the
hydrostatic pressure test
Check marking on boiler, detachable boiler
Final inspection after
7.3 parts and nameplate
hydrostatic pressure test
Ensure completeness of the data dossier, the
documentation, and actions 1.1 to 7.2 carried
out
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
5.5 Non-destructive examinations
5.5.1 General

The non-destructive testing (NDT) shall be performed after the last post-weld heat treatment (PWHT).

5.5.2 Extent of non-destructive examination

5.5.2.1 Boilers with weld factor v = 0,7, only 100 % visual testing is required, no non-destructive

testing (NDT) is required.

5.5.2.2 Boilers with weld factor v = 0,85 or weld factor v = 1, 100 % visual testing is required and

non-destructive testing (NDT) shall be in accordance with Table 2.
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
Table 2 — Extent of NDT for welds
Percentage of total length of weld to be tested
Hydrostatic water pressure test pt
Figures of EN 12953-4:2018, Testing
h i i
Component Type of weld Weld location Footnotes < 1,85 x PS ≥ 1,85 x PS
Annex A technique
Weld factor
1 0,85 0,85
All welds — — — Visual 100 100 100
a b
Shell Longitudinal In shell section Table A.1, RT or UT and 100 10 10
Figures A.1 to A.5
a b c
Circumferential Between shell RT or UT , and 25 10 10
sections
a b c d
Circumferential Between shell RT or UT , , and 25 10 10
sections and flanged
end plates
b f
T-butt At junction of shell UT and 10 10 10
with set-in end plates
End plates Butt Between two or more Table A.1, RT or UT 100 100 100
parts
Figure B
Furnaces Longitudinal In furnace sections Table A.1, RT or UT 10 10 10
Figures C.1 to C.7
a b
Circumferential Between furnace RT or UT and 10 10 10
sections and between
furnace and bowling
hoops
a b
Furnace and Circumferential Between furnace Table A.1, RT or UT and 10 10 10
Plates sections and flanged
Figures C.1 to C.7
end plates
Cross section RT or UT 100 100 100
b e f
T-butt Between furnace UT , and 25 25 10
sections and set-in
end plates
j b
T-butt Furnace to reversal UT or RT 10 10 10
chamber end plates
b e f
Reversal Longitudinal In wrapper plate Table A.1, RT or UT , and 25 10 10
chambers Figures D.1 to D.5
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)
a b
Circumferential Between wrapper RT or UT and 10 10 5
plate and flanged end
plate
j b e f
T-butt Between wrapper UT or RT , and 10 10 5
plate and flanged end
plate
Reversal Longitudinal In access tube Table A.1, RT or UT 10 10 0
chamber
Figures E.1 and E.2
access tube
b e f
T-butt Access tube to boiler UT , and 10 10 0
and reversal end plate
chamber end plates

Gusset and T-butt at toes and heels Between stay and Table A.1, PT or MT 100 100 100

girder stays plate
Figures F.1 and F.2
EN 12953-3:2016, Figures 29
and 32

Openings in shells T-butt Branches, tubes Table A.1, Figures I.1 to I.5 PT or MT 10 10 0

The percentage of welds to be examined shall include each intersection of longitudinal and circumferential seams. For each longitudinal and circumferential seam there shall be at least

one radiograph, or where ultrasonic testing is specified, at least a 200 mm length shall be examined.

In each case the section of weld to be tested shall be selected at random.

If the end plates are fully stayed to each other by bar stays, stay tubes, or a combination of bar stays and reversal chamber stays, 10 % of the length of the circumferential seams shall be

non-destructively examined. All seam intersections shall be NDT.

If the flange is thicker than the end plate, the flange shall be machined to a taper and welded in a manner to that shown in

EN 12953-4:2018, Annex A, Table A.1, Figures A.1 to A.3.

If T-butt welds cannot be ultrasonically examined due to physical limitations, they shall be visually examined at the following stages — weld preparation, tack welding, initial root run,

finished weld, and shall be subjects to MT or PT on completion.

The position of the tested section of weld shall be marked on the boiler and recorded.

Where PT or MT is impractical other tests of a recognized value may be carried out. If any indications out of tolerances (defects) after MT or PT, 100 % MT or PT to be carried out on the

complete welds of the concerned gusset or girder.

For welding factor 1,0 the scope of NDT is independent from the test pressure pt.

The test pressure shall be determined according to EN 12953-3:2016, 5.7.4 and be in the range between the minimum test pressure calculated by Formulae (3) and (4) and the maximum

test pressure limited by 5.7.4 a), b) and c). In case that the selected test pressure PT ≥ 1,85*PS and the welding factor chosen for design is 0,85 the reduced scope of NDT given in this

column can be applied.
UT is the normal method of examinations, RT can be used if applicable.
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SIST EN 12953-5:2020
EN 12953-5:2020 (E)

If, during inspection, a defect is detected in the weld under examination, the following additional

inspections shall be carried out prior to any repair, (see Figure 1).
a) Cross welds:

If the defect occurs in the region of a weld intersection, a check shall be made in the longitudinal and

circumferential weld at each side of the intersection.
b) Circumferential and longitudinal welds:

For defects in the circumferential and longitudinal seam welds, a check shall be made at each side of

the defect.
Key
Weld under examination X1 ... X7 checks points
Additional examinations ≥ 200 mm N Cross weld defect
1 Longitudinal weld L Longitudinal weld defect
2 Circumferential weld C Circumferential weld d
...

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